Get your taxes done using TurboTax

After another hour plus on the phone today, the customer service person told me my product key is invalid.  She said it was used by another person and then returned.  I don't know why TurboTax didn't tell me the product key was invalid when I first installed it.  I bought the TurboTax from a non-authorized seller, so I was told to go back to the seller to request a refund and re-purchase the software at an authorized seller.